//******************************************************************************
//     Average.java    Author: 20172330
// 
//     Demonstrates the use of a while loop,a sentinal value, and a running sum.
//******************************************************************************

import java.text.DecimalFormat;
import java.util.Scanner;

public class Average
{
      //------------------------------------------------------------------------
      //   Computes the average of a set of values entered by the user.
      //   The running sum is printed as the numbers are entered.
      //------------------------------------------------------------------------
      public static void main(String[] args)
      {
          int sum = 0, value, count = 0;
          double average;
      
          Scanner scan = new Scanner(System.in);
          System.out.print("Enter an integer (0 to quit): ");   
          value =scan.nextInt();
     
          while (value != 0) // sentinel value of 0 to terminate loop
          {
               count++;
   
               sum += value;
               System.out.println("The sum so far is " + sum);
    
               System.out.println("Enter an integer (0 to quit): ");
               value = scan.nextInt();
          }
        
          System.out.println();

          if (count == 0)
               System.out.println("No values were entered.");
          else 
          {
               average = (double)sum / count;

               DecimalFormat fmt = new DecimalFormat("0.###");
               System.out.println("The average is "+ fmt.format(average));
           }
      }
}




